JP3431103B2 - Ground stabilization method - Google Patents
Ground stabilization methodInfo
- Publication number
- JP3431103B2 JP3431103B2 JP23293894A JP23293894A JP3431103B2 JP 3431103 B2 JP3431103 B2 JP 3431103B2 JP 23293894 A JP23293894 A JP 23293894A JP 23293894 A JP23293894 A JP 23293894A JP 3431103 B2 JP3431103 B2 JP 3431103B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- fibers
- spraying
- stabilization method
- compressed air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、地盤安定化工法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground stabilization method.
【０００２】[0002]
【従来の技術】従来、法面等の地盤強化のための吹き付
け工法としては、吹付客土、モルタル類単独、または、
法面にラス金網を張設した状態で吹き付け材料の吹き付
けを行っていたが、この方法では強度の面で限界があ
り、例えば、吹き付け直後の降雨や融雪水などにより吹
き付け材料の流亡崩壊および緑化基盤材の流水による浸
食などが発生していた。2. Description of the Related Art Conventionally, as a spraying method for strengthening the ground such as slopes, spraying soil, mortars alone, or
Although the spraying material was sprayed with the lath wire mesh stretched on the slope, this method has a limit in terms of strength.For example, the sprayed material may run away due to rainfall or snow melting immediately after spraying and greening. The base material was eroded by running water.
【０００３】そこで、地盤安定化工法として吹き付け材
料としてのモルタル等の中に連続長繊維を混入すること
が、特公昭53-47602号公報や特開昭55-167170 号などに
開示されている。このような連続長繊維としてはガラス
繊維やポリエステル、ポリアミド、アクリル、ポリビニ
アルコール（アセテート化合物を含む）、ポリプロピレ
ン、ポリエチレン、ポリ塩化ビニル、ポリ塩化ビニリデ
ン、アセテートなどの各系列の樹脂による嵩高加工糸で
ある。Therefore, as a ground stabilization method, mixing continuous long fibers into mortar or the like as a spraying material is disclosed in Japanese Patent Publication No. 53-47602 and Japanese Patent Publication No. 55-167170. Such continuous filaments are bulky yarns made of glass, polyester, polyamide, acrylic, polyvinyl alcohol (including acetate compound), polypropylene, polyethylene, polyvinyl chloride, polyvinylidene chloride, acetate and other series resins. Is.
【０００４】また、連続長繊維を吹き付け材料に混入す
る方法としては、中空圧送路内に吹き込む空気や高圧水
の流れに連続長繊維糸条を乗せて、この中空圧送路端に
設けた吹き付けノズルから対象部位に向けて吐出する
が、吹き付け材料の吹き付けノズルと連続長繊維の給糸
ノズルとが併設されて同時吹き付けを行う場合と、給糸
ノズルから可撓性パイプで吹き付けノズルに連結し、給
糸ノズルからの吐出される糸を吹き付けノズル内に導
き、吹き付け材料とともに吐出する場合とがある。As a method of mixing the continuous long fibers into the blowing material, a continuous long fiber yarn is put on the flow of air or high-pressure water blown into the hollow pressure feeding passage, and a blowing nozzle provided at the end of the hollow pressure feeding passage. Discharge from the target portion from the, but when performing a simultaneous spraying with the spraying nozzle of the spraying material and the yarn feeding nozzle of continuous filament, and from the yarn feeding nozzle connected to the blowing nozzle with a flexible pipe, In some cases, the yarn discharged from the yarn supplying nozzle is guided into the blowing nozzle and discharged together with the blowing material.
【０００５】[0005]
【発明が解決しようとする課題】このような連続長繊維
を吹き付け材料に混入する地盤安定化工法では、ノズル
マンの感覚に頼ることになるために、吐出された繊維が
一か所に集まり易く、吹き付け材料中に均一に混入させ
るのが困難である。また、混入する繊維の量を調整する
ことも困難である。In the ground stabilization method in which such continuous long fibers are mixed in the spray material, the discharged fibers are easily gathered in one place because they rely on the feeling of the nozzle man. It is difficult to mix it uniformly in the spray material. It is also difficult to adjust the amount of fibers mixed.
【０００６】さらに、供給する連続長繊維が途中で切断
や繊維の絡みなどのトラブルも発生し易く、ホース内で
の糸詰まり等の原因ともなり、作業再開のための糸通し
等の作業も手作業にたより手間の掛かるものであった。Further, troubles such as cutting and entanglement of the continuous continuous fibers are likely to occur in the middle, which may cause thread clogging in the hose, and threading work for resuming work is also a handy task. It was troublesome to work.
【０００７】なお、短尺の繊維をモルタル類の吹き付け
を行うと同時に吹き付ける方法もあるが、この方法は吹
き付けノズル本体と短尺の繊維の吐出ノズルは別のノズ
ルとして構成され、装置の重量・容積等が大きく扱い難
いものとなる。また、各ノズルからの吹き付け材料と短
尺の繊維の合流点ではモルタル類の吹き付け圧力で繊維
がはね飛ばされて均等な混合が困難であるばかりでなく
ロスが多く経済的にも不利である。There is also a method of spraying short fibers at the same time as spraying mortars. In this method, the spray nozzle main body and the short fiber discharge nozzle are configured as separate nozzles, and the weight and volume of the apparatus, etc. Will be large and unwieldy. Further, at the confluence point of the material sprayed from each nozzle and the short fiber, the fiber is splashed by the spraying pressure of the mortar, and it is difficult to mix the fibers uniformly, and there are many losses, which is economically disadvantageous.
【０００８】本発明の目的は前記従来例の不都合を解消
し、繊維を独立繊維として吹き付け材料に混入するので
糸詰まりもなく均一に混入でき、しかも、その混入量も
自由に調整でき、また、ノズルは単独で作業員が扱い易
い地盤安定化工法を提供することにある。The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example and to mix the fibers as independent fibers into the spraying material so that the fibers can be mixed uniformly without thread clogging, and the mixing amount can be freely adjusted. The nozzle is to provide a ground stabilization method that is easy for workers to handle.
【０００９】[0009]
【課題を解決するための手段】本発明は前記目的を達成
するため、地表面に吹き付け材を吹き付けノズルで吹き
付ける際に吹き付け材に繊維を混入させて吹き付ける地
盤安定化工法において、前記吹き付けノズルへの吹き付
け材供給管路に圧搾空気や高圧水とともに繊維を供給す
る繊維供給管を合流させ、この繊維供給管の途中に、繊
維の挿入部として、繊維切断機を配置し、繊維切断機に
対してボビン等を配置した繊維供給装置からの連続繊維
を導入し、さらにコンプレッサーからの圧搾空気管を直
接吹き付けノズルに接続し、吹き付け材供給管からの吹
き付け材にこの圧搾空気管からの圧搾空気を添加し、ま
た、圧搾空気や高圧水とともに任意長さに切断された独
立繊維を吹き付けノズルへ供給すること、および、任意
長さに切断される繊維は、２cm〜６cm程度の極短繊維で
あること、もしくは、６cm〜 100cm程度の短繊維である
こと、さらに、繊維は鋼繊維であること、または、繊維
は合成繊維であり、吹き付け材は緑化基盤材であること
を要旨とするものである。Means for Solving the Problems To achieve the above object, the present invention provides a ground stabilization method in which fibers are mixed into a spray material when spraying the spray material onto the ground surface with a spray nozzle. A fiber supply pipe that supplies fibers together with compressed air and high-pressure water is joined to the blowing material supply pipe of, and a fiber cutting machine is arranged as a fiber insertion part in the middle of this fiber supply pipe. Introduce continuous fibers from a fiber supply device with a bobbin, etc., connect the compressed air pipe from the compressor directly to the blowing nozzle, and use the compressed air from this compressed air pipe to the blowing material from the blowing material supply pipe. Adding and supplying compressed fibers and high-pressure water to the spray nozzle of the independent fiber cut to arbitrary length, and cutting to arbitrary length The fiber is a very short fiber of about 2 cm to 6 cm, or a short fiber of about 6 cm to 100 cm, the fiber is a steel fiber, or the fiber is a synthetic fiber, and the spray material is The gist is that it is a greening base material.
【００１０】[0010]
【作用】請求項１記載の本発明によれば、吹き付けノズ
ルへは吹き付け材とともに繊維切断機で切断された独立
繊維が供給されるので供給する連続長繊維が途中で切断
してしまうトラブルは心配する必要がなく、また、独立
繊維であるがゆえに吹き付け材に均一に混入することが
できる。According to the present invention as set forth in claim 1, since the independent fibers cut by the fiber cutting machine are supplied to the spray nozzle together with the spray material, there is a concern that the continuous continuous fiber to be supplied may be cut on the way. Since it is an independent fiber, it can be uniformly mixed in the spray material.
【００１１】しかも、繊維供給管路での圧搾空気や高圧
水による搬送速度と繊維切断機での切断間隔により供給
する独立繊維量を自由に調整でき、その結果、アスペク
ト比の決定も自在である。Moreover, the amount of independent fibers supplied can be freely adjusted by the conveying speed of compressed air or high-pressure water in the fiber supply pipe and the cutting interval of the fiber cutting machine, and as a result, the aspect ratio can be freely determined. .
【００１２】また、吹き付けノズルの他に別途繊維吐出
ノズルを併存させる必要がないので扱い易い。Further, since it is not necessary to separately provide a fiber discharge nozzle in addition to the spray nozzle, it is easy to handle.
【００１３】請求項２および請求項４記載の本発明によ
れば、任意長さに切断される繊維は、２cm〜６cm程度の
短繊維であるので、いわゆるスチールファイバー等の鋼
繊維をモルタル等の吹き付け材に混入させることも可能
となり、アスペクト比を自在に大きくできることで鋼繊
維補強コンクリートの各種強度、靱性を高めることが施
工性を損なうことなく可能となる。According to the present invention as set forth in claims 2 and 4, the fibers cut to an arbitrary length are short fibers having a length of about 2 cm to 6 cm. It is also possible to mix it in the spray material, and by increasing the aspect ratio freely, it is possible to increase the various strengths and toughnesses of the steel fiber reinforced concrete without impairing the workability.
【００１４】請求項３および請求項５記載の本発明によ
れば、任意長さに切断される繊維は、６cm〜 100cm程度
の短繊維であり、合成繊維を緑化基盤材である吹き付け
材に混入させるのに適する。According to the present invention as set forth in claims 3 and 5, the fibers cut to an arbitrary length are short fibers of about 6 cm to 100 cm, and synthetic fibers are mixed with a spraying material which is a greening base material. Suitable to let.
【００１５】[0015]
【実施例】以下、本発明の実施例を図面について詳細に
説明する。図１は本発明の地盤安定化工法で使用する装
置の１実施例を示す説明図で、図中１は吹き付け材の吹
き付けノズルを示す。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of an apparatus used in the ground stabilization method of the present invention, in which 1 denotes a spraying nozzle for spraying material.
【００１６】この吹き付けノズル１には耐圧ホースによ
る吹き付け材供給管２が接続され、吹き付け材がモルタ
ルの場合は、この吹き付け材供給管２の途中にモルタル
ポンプ３が配設され、さらに吹き付け材供給管２の端は
モルタルミキサー４に接続される。A spraying material supply pipe 2 by a pressure-resistant hose is connected to the spraying nozzle 1, and when the spraying material is mortar, a mortar pump 3 is arranged in the middle of the spraying material supply pipe 2 to further supply the spraying material. The end of the tube 2 is connected to the mortar mixer 4.
【００１７】また、コンプレッサー５からの圧搾空気管
の途中に繊維の挿入部を設けてこの圧搾空気管を圧搾空
気とともに繊維を供給する繊維供給管６として前記吹き
付けノズル１に接続させるが、前記繊維の挿入部には繊
維切断機７を配置し、この繊維切断機７に対してボビン
８ａ等を配置した繊維供給装置８からの連続繊維を導入
し、繊維切断機７で切断した独立繊維を繊維供給管６に
送り込むものとする。Further, a fiber insertion portion is provided in the middle of the compressed air pipe from the compressor 5, and this compressed air pipe is connected to the blowing nozzle 1 as a fiber supply pipe 6 for supplying fibers with compressed air. A fiber cutting machine 7 is arranged in the insertion part of the fiber, continuous fibers are introduced from the fiber feeding device 8 in which a bobbin 8a and the like are arranged to the fiber cutting machine 7, and the independent fibers cut by the fiber cutting machine 7 are It shall be sent to the supply pipe 6.
【００１８】前記繊維切断機７としては、ロービングカ
ッターによるものでも、また、上下する切断刃によるも
のやヒートカッターでもよく、その形式の如何を問わな
いが、繊維の切断長さは自由に変えることができるもの
とする。The fiber cutting machine 7 may be a roving cutter, an up and down cutting blade, or a heat cutter, which may be of any type, but the fiber cutting length may be freely changed. Be able to
【００１９】さらにコンプレッサー５からの圧搾空気管
９を直接吹き付けノズル１に接続し、吹き付け材供給管
２からの吹き付け材にこの圧搾空気管９からの圧搾空気
管を添加して吹き付け材を勢いよく吐出するようにして
いる。Further, the compressed air pipe 9 from the compressor 5 is directly connected to the blowing nozzle 1, and the compressed air pipe from the compressed air pipe 9 is added to the blowing material from the blowing material supply pipe 2 to vigorously blow the blowing material. I am trying to eject.
【００２０】なお、繊維供給管６と吹き付け材供給管２
とは吹き付けノズル１の本体部にＹ字の継手を設けてこ
の継手での合流接続とする。The fiber supply pipe 6 and the spray material supply pipe 2
Means that a Y-shaped joint is provided on the main body of the spray nozzle 1 and a merging connection is made at this joint.
【００２１】前記繊維供給装置８で供給する繊維として
は、ガラス繊維、ポリエステル、ポリアミド、アクリ
ル、ポリビニアルコール（アセテート化合物を含む）、
ポリプロピレン、ポリエチレン、ポリ塩化ビニル、ポリ
塩化ビニリデン、アセテートなどの各系列の合成樹脂繊
維、鋼繊維、カーボン繊維、紙繊維、動物繊維などから
用途に応じて適宜選択できる。The fibers supplied by the fiber supply device 8 include glass fiber, polyester, polyamide, acrylic, polyvinyl alcohol (including acetate compound),
It can be appropriately selected from various series of synthetic resin fibers such as polypropylene, polyethylene, polyvinyl chloride, polyvinylidene chloride and acetate, steel fibers, carbon fibers, paper fibers, animal fibers and the like according to the application.
【００２２】このようにしてモルタルポンプ３によりモ
ルタルミキサー４から吹き付け材供給管２を介して送ら
れるモルタルに対して、吹き付けノズル１の所で繊維切
断機７で切断された独立繊維が混入され、繊維入りのモ
ルタルとして吹き付けノズル１から吐出されて地表面に
吹き付けられる。In this way, the independent fibers cut by the fiber cutting machine 7 at the spray nozzle 1 are mixed into the mortar sent from the mortar mixer 4 through the spray material supply pipe 2 by the mortar pump 3. The mortar containing fibers is discharged from the spray nozzle 1 and sprayed onto the ground surface.
【００２３】前記繊維切断機７で切断する繊維の長さは
使用する繊維の種類でも異なり、合成樹脂繊維等では６
cm〜 100cm程度の短繊維とする。The length of the fiber cut by the fiber cutting machine 7 varies depending on the kind of the fiber used, and is 6 for synthetic resin fiber or the like.
Use short fibers of about cm to 100 cm.
【００２４】また、鋼繊維では２cm〜６cm程度の極短繊
維であることが望ましい。これにより吹き付け材はスチ
ールファイバーコンクリートとして構成できる。Further, it is desirable that the steel fiber is a very short fiber of about 2 cm to 6 cm. This allows the spray material to be constructed as steel fiber concrete.
【００２５】さらに他の実施例として吹き付け材を緑化
基盤材としてもよい。この緑化基盤材としては、セメン
トと土砂と種子、もしくは種子と有機材との混合物など
がその一例であるが、ビートモスとパーク肥料と砂など
の組合せも可能である。As yet another embodiment, the spray material may be a greening base material. An example of this greening base material is a mixture of cement, earth and sand and seeds, or a mixture of seeds and organic materials, but a combination of beet moss, park fertilizer and sand is also possible.
【００２６】かかる緑化基盤材を吹き付け材とする場合
は、鋼繊維は不適当であるが、その他の繊維、合成樹脂
繊維等では２cm〜６cm程度の極短繊維でも６cm〜 100cm
程度の短繊維でもその状況に応じて選択すればよい。When such a greening base material is used as a spray material, steel fibers are unsuitable, but other fibers, synthetic resin fibers, etc., even 6 cm to 100 cm even for extremely short fibers of about 2 cm to 6 cm.
Even short fibers may be selected according to the situation.
【００２７】また、前記実施例はコンプレッサー５から
の圧搾空気を利用する場合について述べたが、このコン
プレッサー５に代えて高圧ポンプを使用し、圧搾空気の
代わりに高圧水を利用して繊維を吐出することとしても
よい。In the above embodiment, the compressed air from the compressor 5 is used, but a high pressure pump is used instead of the compressor 5, and high pressure water is used instead of compressed air to discharge the fibers. It may be done.
【００２８】[0028]
【発明の効果】以上述べたように本発明の地盤安定化工
法および装置は、繊維を独立繊維として吹き付け材料に
混入するので糸詰まりもなく均一に混入でき、しかも、
その混入量も自由に調整でき、また、ノズルは単独なの
で作業員が扱い易いものである。As described above, in the ground stabilization method and apparatus of the present invention, the fibers are mixed as independent fibers into the spray material, so that the fibers can be mixed uniformly without thread clogging.
The mixing amount can be freely adjusted, and the single nozzle is easy for the operator to handle.
【図１】本発明の地盤安定化工法で使用する装置の１実
施例を示す説明図である。FIG. 1 is an explanatory view showing one embodiment of an apparatus used in the ground stabilization method of the present invention.
１…吹き付けノズル ２…吹き付け材料
供給管
３…モルタルポンプ ４…モルタルミキ
サー
５…コンプレッサー ６…繊維供給管
７…繊維切断機 ８…繊維供給装置
８ａ…ボビン ９…圧搾空気管DESCRIPTION OF SYMBOLS 1 ... Spraying nozzle 2 ... Spraying material supply pipe 3 ... Mortar pump 4 ... Mortar mixer 5 ... Compressor 6 ... Fiber supply pipe 7 ... Fiber cutting machine 8 ... Fiber supply device 8a ... Bobbin 9 ... Compressed air pipe
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−66026（ＪＰ，Ａ) 特開 昭61−5172（ＪＰ，Ａ) 特開 昭62−236965（ＪＰ，Ａ) 特開 昭61−186668（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continued front page (56) Reference JP-A-6-66026 (JP, A) JP 61-5172 (JP, A) JP 62-236965 (JP, A) JP-A-61-186668 (JP, A)
Claims (5)
吹き付ける際に吹き付け材に繊維を混入させて吹き付け
る地盤安定化工法において、前記吹き付けノズルへの吹
き付け材供給管路に圧搾空気や高圧水とともに繊維を供
給する繊維供給管を合流させ、この繊維供給管の途中
に、繊維の挿入部として、繊維切断機を配置し、繊維切
断機に対してボビン等を配置した繊維供給装置からの連
続繊維を導入し、さらにコンプレッサーからの圧搾空気
管を直接吹き付けノズルに接続し、吹き付け材供給管か
らの吹き付け材にこの圧搾空気管からの圧搾空気を添加
し、また、圧搾空気や高圧水とともに任意長さに切断さ
れた独立繊維を吹き付けノズルへ供給することを特徴と
する地盤安定化工法。1. A ground stabilization method in which fibers are mixed into a spraying material when spraying the spraying material onto the ground surface with a spraying nozzle, and in the spraying material supply pipeline to the spraying nozzle, the fiber is mixed with compressed air and high-pressure water. The fiber supply pipes for supplying are joined together, and in the middle of this fiber supply pipe, a fiber cutting machine is arranged as a fiber insertion part, and continuous fibers from the fiber supply device in which a bobbin or the like is arranged with respect to the fiber cutting machine. In addition, the compressed air pipe from the compressor is directly connected to the blowing nozzle, the compressed air from this compressed air pipe is added to the blowing material from the blowing material supply pipe, and the compressed air or high pressure water can be added to any length. A ground stabilization method characterized in that the independent fibers cut into pieces are supplied to a spray nozzle.
cm程度の極短繊維である請求項１記載の地盤安定化工
法。2. The fibers cut to an arbitrary length are 2 cm to 6 cm.
The ground stabilization method according to claim 1, which is an ultrashort fiber having a size of about cm.
00cm程度の短繊維である請求項１記載の地盤安定化工
法。3. A fiber cut to an arbitrary length has a length of 6 cm to 1 cm.
The ground stabilization method according to claim 1, which is a short fiber of about 00 cm.
求項２記載の地盤安定化工法。4. The ground stabilization method according to claim 1, wherein the fibers are steel fibers.
緑化基盤材である請求項１記載の地盤安定化工法。5. The ground stabilization method according to claim 1, wherein the fiber is a synthetic fiber and the spray material is a greening base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23293894A JP3431103B2 (en) | 1994-09-28 | 1994-09-28 | Ground stabilization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23293894A JP3431103B2 (en) | 1994-09-28 | 1994-09-28 | Ground stabilization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0892964A JPH0892964A (en) | 1996-04-09 |
| JP3431103B2 true JP3431103B2 (en) | 2003-07-28 |
Family
ID=16947207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23293894A Expired - Fee Related JP3431103B2 (en) | 1994-09-28 | 1994-09-28 | Ground stabilization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3431103B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5791973B2 (en) * | 2011-06-10 | 2015-10-07 | 株式会社平和 | Equipment device and game machine |
-
1994
- 1994-09-28 JP JP23293894A patent/JP3431103B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0892964A (en) | 1996-04-09 |
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